Teteg-rabh repeater



June 9, 1925.

B. P. HAMILTON TELEGRAPH RPEATER Filed May '7, 1924 5 Sheets-Sheetl 1 Iig' A TTQANE l" June 1925.

B. P. HAMILTON TELEGRAPH REPEATER v 3 Sheets-Sheet 2 Filed May '7l 1924 A TTORNE Y June 9, 1925.

B. P. HAMILTON TELEGRAPH REPEATER S Sheets-Sheet 5 Filed Ma'y 7, 1924 Patented .lune 9, 1925.

UNITED STATES PATENT oFF-ice.

BAK P. HAMILTON, F RVER 'NEW' JERSEY, ASSIGNOR TO'AMERICAN TELE- PNE AND TELEGRAPH. C'MPANY, A CORPORATION OF NEW YORK. "'V i rnnnena'rn nnrnarnn.

Application filed 7,

To all Itir/l ola t fifi/y concern/.f

Be it known that I, Barren P.k Hermann, residing at `lliver Edge, in the county ot Bergen and State oit New Jersey, have invented certain improvements in Telegraph llepeaters, ot which the following is a speciication.

This invention relates to telegraph repeater sets and more particularly to' a uni, versa-l type ot telegraph set over the local circuits ot which repeating may tahe'place tro-in a plurality ot different types of telegraph channels terminating at a station.

among the different types ot' `telegraph channels terminating at a station maybe iound open wire bridge polar duplex channels, differential polar duplex metallic; channeis operatin'g over cables, open wire carrier telegraph channels, voice "frequency telegraph'channels and other types ottelegraph channels. These various telegraph systems dilater from each other in many rcspects due vto the tact that they were developed at different times and also because dit- `ferent electrical conditions had to be met in each instance, and hence it has been the practice to provide at the station at which the lines ot these systems terminate different types ot' repeater sets orl local circuits for each type ot channel or system. The apparatus required and the mechanical arrangement ot the repeater sets required tor the ditl'erent channels has didered radically in each instancel Obviously a station at which only one type ot telegraph set was utilized would present great advantages from the standpoint ot flexibility, maintenance, and operation over a station employing a ninnbcr ot. different types otl sets. Accordingly it is the main purpose oil? this invention to provide a universal type ot' repeater set, or one suitable for use ivith a plurality oit' dili-` ierent channels and over the local circuits ot which repeating may take place troni a plurality of the di 'itterent types of telegraph channels at the station. Other features and objects ot the invention will appear more 'fully trom the detailed description hereinafter given. y

The invention may be more fully understood troni the following description together with the accompanying` drawingin the Figures l, 2. 3, and lot which the invention isrillustrated. Figs. 1 and 2 when taken 1924. vSerial No. 711,684.

Vset is shown terminating in jack J1. A metallic channel together With a'metallic coni-` posite set and an artificial cable is shown terminating in the acks J2 and J3. A carrier channel with a schematic showing ot detector and oscillator is shown terminating in jacks il, and Other different types ot channels might also be shown but the above types are sutlicient tor purposes of illustrating the invention.` The universal repeater set is. shown terminating in the plugs P1 and l), adapted to be connected Withthe jacks vabove mentioned. The repeater set includes switching arrangements whereby the relays may be connected in the circuit in different positions. A receiving relay l may be 'connected in the circuit as shown when a connection is established with an open Wire channel. The same receiving relay 2 may be connected in the circuit in the manner shown when a connection is established With a metallic channel and the same type of receiving relay 3 may be inserted in thesivitching arrangements and connected in the cir-` cuit in the manner shown when a connection is established with a carrier channel. The contacts ot the relaysl, 2 and 3, respectively, are termed the pole changers fl, 5, and 6. A conductor 24 shown connected to these pole changers and also connected with conductor 30 terminating in jack JS ot the receiving leg. The pole changers Will establish connections between conductor 2st and the oppositely poled receiving-leg batteries associated With jacks Ji., and il? By this arrangement impulses ot opposite polarity may be transmitted out over the receiving` leg under control ot the relays 1, 2 or 3.

The sending arrangements of the repeater set comprise switching arrangements Whereby the sending relays may be connected with the sending legin different Ways depending upon the type ot line or channel with which a connection is established. For example` the sending relay 1 3 might be connected with the sending leg in the manner shown when a connection was established with an open wire line. The same sending relay 12 might be connected in the circuit as shown when a connection was established with a metallic line and the same type of sending relay 11 might be connected in the circuit as shown when a connection was established with a carrier line. A break relay 10 and a meter 9 are also provided. The armatures 15, 16, 17 and 18 of the sending relays 11, 12, and 18 control the application of current impulses over circuits ot' the repeater set to the plugs l), andl P2 and thence to the connected line. ln the cases of a connection with a metallic or open wire channel this current is supplied from the line batteries connected to the contacts of key K2. @ther details of the circuit arrangements of the repeater set will appear more fully from the following description of its operation.

ln Figs. 3 and 4l: are shown types of switching arrangements suitable for connecting the relays in the circuits of the repeater set. In Fig. 3 is shown a relay 30 mounted on a base 30. Atlixed to the base are the holding plugs 51, 52, 53, and 54. Projecting through the base are the con" tactplugs of the relay 8,1 told-2 inclusive.

In F ig. a is shown a jack panel 55 having jacks numbered with the added designation prime to fit the correspondingly numbered plugs of the relay. The plugs of the relay are simply inserted into the jacks of the panel to connect the relay in the circuit in the manner illustrated in the circuit diagram. Other suitable switching arrangements might be employed however, if desired.

rlhe operation of the arrangements of the invention is as follows: For operation with an open wirey channel a receiving relay 1 is connected in the circuit as shown by being plugged into the proper jack and the plug P, is inserted in the jack J1. The key K.l will also be thrown to the right. The above operations will allow a circuit to be completed from the open wire channel through the ktip contacts of jack il, and plug P1, over conductor 60, left-hand windings of relay 1, conductor 61, upper winding of meter 8, conductors 62 and63, right-hand windings of relay 1, to the artificial line 7 and ground. Accordingly, the relay 1 will be actuated by the current impulses coming in over the open wire channel.. A parallel circuit with the above traced circuit will also be closed through the lower winding of meter S by the actuation of key K1 as follows: from conductor 61, over conductor 64, contact of key K1, conductor 65, lower winding of meter 8, conductor 66, contact of key- K1, to conductor 63 and thence as previously traced. Accordingly, the impulsts coming in over the vopen wire channel will operate the relay 1 which in turn will actuate the pole changer t. The pole changer t' will connectv positive or negative battery to conductor 2li in the following manner: lVith the battery reversing key `Kn lthrown to the right and the duplex key K;

thrown to the full position positive battery will be applied to the upper contact of pole changer t as follows: from positive battery connected to jack J7, conductor 67, conductor 68, lower right-hand contact of key K2, conductor 69, conductor 70, contacts of key K5, conductor 27, and over conductor 26 to the upper contact and armature of pole changer 1 from whence it may be applied to 4conductor 211. Negative battery may be applied to the lower contact of pole changer 4 as follows: from negative battery connected to jack JG, conductors 74 and 7 5, upper right-hand contact of key K2, conductor 76, conductor 28,` conductor 25, to

Ythe lower contactY and armature` of pole changer 4, from whence it may be applied to conductor 24:. Frein conductor 2&1 these impulses of different, polarity may be applied to the receiving leg as follows: from conductor 24, conductor 29, contactsk of key K5, conductor 71, contacts `of'key K2, conductor 72, left-hand contact and armature of relay 19, conductor 73, contacts of key IQ, over conductor 30 to jack J3 of the receiving leg and thence to a subscribers set if desired. If a connection is established with a metallic channel the plugs P1 and P2 are plugged into the acks J 2 and L, respectively. Impulses from the metallic channel will then be transmitted through the metallic receiving relay 2, which will be connected in the circuit as shown, as follows: from the upper contacts of jack J2 and plug P1, conductor 77, lower windings of relay 2 and meter S, conductor 78, and upper contactsv of plug P2 and jack J3 to the artificial line of the metallic channel; and also from the lower contacts of jack J2 and plug P1, over conductor 79, upper windings of relay 2 and meter 8, conductor S0, lower contacts of plug P2 and jack J3, to the artificial line- Accordingly the impulses from the metallic channel will operate the metallic receiving relay 2, which in turn will control .the pole changer 5. In a similar manner as already pointed out with respect to the pole changer l potentials of opposite polarities will beapplic( to the contacts of pole changer 5, and thence to the conductor 24, and from thence to the receiving leg J5 as heretofore pointed out. Accordingly the impulses from the metallic channel will be repeated by the relay 2 to the receiving legn and thence to the subscribers set if desired. If a connection is established with a carrier channel the plugs P1 and P2 are inserted in the jacks .L and J5, respectively, and the carrier receiving lll) ` to the receiving leo' relay 3 is plugged into the circuit as shown and key l, is thrown to thelett. T he impulses 'from the detect-or will be transmitted to the relay 3 as follows-z from the upper contacts of jack J4 and plug lill, conductor T7, conductor S1, winding ot relay 3, con` ductor 82, lower winding et meter 8, conductor 83, winding ot relay 3, conductor 8l, conductor 79, to the lower contacts ot' plug l), and jack J4. The impulses irom the carrier channel thus transmitted through the relay 3 will cause the relay to operate to control the pole changer 6. The pole changer his arranged in a manner similar to pole changers and 4lhereto'tore described and serves to apply current impulses The sending arrangements ot the repeater set operate in the io'l'lowing manner: il subscriberls set may he connected with the sending leg 36 through the `jack L. lt a connection is to be establishedwith an 4open wire channel an open wire sendingl relay 13 will be plugged into the circuit iu the manner shown. The key K?, would be thrown to the right and the plug l), inserted in the jack J, and key K, would be thrown to the right. The impulses trom the subscribers set will then be transmitted over the following` circuit: Vfrom the subscribers set over conductor 83, contacts; ot:

key KG, conductor Si', right-hand arni tureA and contact ot relay/"119, conductor 89, upper contacts ot key Km conductor 90, -upper winding ot the open wire sendingl relay 13, upper winding of break relay 10, meter 9, conductor 201, contacts of key K5, conductor 202', to the sending leg battery. Accordingly, these impulses will operate the open wire sending relay 13 which will in turn operate its armature 18, the contacts ot which are connected to conductors 93 and 9st. Batteries ot opposite polarity are connected to conductors 93 and 94 over the cont-acts ot key IQ. Accordingly, potentials ot opposite polarityrwill be applied to the armature 18 and from thence will be transmitted over the i oll r\vi1ig circuit: from armature 18, conductor 95, conductor 96, conductor 97, meter 8, left-hand winding of relay 1, conductor 60, upper contacts ot plug P, and jack J1 to the open wire channel. lt is pointed out that a balancing` circuit is also provided for the lower windings ot the sending relays as follows: from meter 9, lowei` winding` ot' break relay 10, lower winding of open wire sending relay 13, conductor 91, lower contacts of key KS, conductor 92, through a balancing resistance to ground. It a connection is to be establishedwith a metallic channel, a metallic sending relay 2 will be plugged into the circuitY as shown, the plugs P, and P2 will be inserted in jacks l2 and Jg, and the key as heretofore described. Y

K, will be thrown to the lett.. 'She impulses transmitted to the sending leg troni the suhscribers set will operate the metallic sending relay 12 over the same circuit as here-- totore traced with respect to the open' wire sending relay 13. AThe relay 1Q will operate its armatures 1G and 17, the contacts ot which. are connected to conductors 98 and 99. Batteries ot opposite polarities are connected to these conductors over the lett hand contacts ot` key IQ. Accordingly, potentials ot opposite polarities will be applied to armaturesl16 and 1T and thence vover the following circuit: from armatures 16 andi?, over conductors 9G and 100, through the noise killer device 2Q, over cenductors 101 and 97,1neter 8, lett-hand windings of relay 2, conductors-7ia and 99 to the contacts ot plug P, and jack J2, and thence to the metallic channel, A balancing circuit is also provided through the righthand winding of relay 2 to the artiiicial cable to prevent the relay from operating at this time. Ita connection is established with a carrier channel the plug P, is connected to the jack J, and plug` P2 and connected to jack J5 and a carrier sendingl relay 11 is pluggedinto the circuit as show The inipulses transmitted to the sending. leg 86 from the subscribers set will operate the carrier sei'iding. relayll over the same circuit as heretofore traced with respect to the metallic and open wire ,sending relays 12 and 13. The relay 11 will operate its armature 15 to connect and disconnect battery 10Q to conductor y103.4 These impulses from armature 15 will be transmitted `over the following circuit: from: i armature 15v` conductor 103, conductor 78, upper contacts of plug P2 and `jack J, to the oscillator to operate it to send impulses out over the carrier channel in a well known manner.

The repeater set may furthermore be provided with a key K, which will control the relay 19 whereby the repeater attendant may'signal in both directions it desired. A reversing keyK7 is also provided to reverse the connections ot the polar sounder 20 .when the battery connection is reversed by the contacts of the break relay 10. The keys K4 to K6 are monitoring keys, which when thrown to the left, operate to cut off the receiving and sending legs and to cenneet them directly to the receiving leg hat teries.

While only three diierent types of telegraph channels have been illustrated it is understood that other and additional types of channels might be used with the universal repeater lset ot' the invention. Accordingly, while the invention has been illustrated in certain specific arrangements which are deemed desirable it is understood that it is capable of embodiment in many and other widely varied forms without departing from the spirit o'l' the inyention as defined in the appended claims.

l/Vhat is claimed is:

l. A telegraph station, a plurality of different types of telegraph channels terminating thereat, a telegraph repeater set adapted to be associated with said channels and comprising a plurality of switching arrangements, a. plurality of receiving relays adapted to be connected in said repeater set by said switching arrangements, each of said Y relays being suitable for operation with and being operated by current impulses coming in over different onesv of said telegraph channels, pole changers controlled by said rel ays, and a receiving leg whereby a connection may be extended from said set, said receiving leg being associated with said pole changers whereby impulses oi" different polarities may be applied to said receiving leg. y c

2A telegraph station, a pluralityof different types of telegraph lines terminating thereat, a telegraph repeater set, connecting means for connecting said repeater set with any of said lines, said repeater set comprising a plurality of switching arrangements, a plurality of sending relays adapted to be connected in said repeater set by said switch- `ing arrangements, said sending relays being suitable for operation when a connection is established with different ones of said telegraph lines, a sending leg circuit to which may be applied current impulses, said sending leg circuit being associated with said sending relays, pole changers controlled by said relays, and circuit arrangements Whereby current impulses may be transmitted 'from said pole changers to said connecting means.

3. A telegraph station, a plurality of different types of telegraphv lines terminating thereat, a telegraph repeater set, connecting means for connecting said repeater setv with any of said lines, said repeater set comprising a set of switching arrangements, a plurality of receiving relays adapted to be connected in said repeater set by said switching arrangements, said receiving relays being suitablefor operation with and being operatedby current impulses coming in over different ones oit said telegraph lines, pole changers controlled by said receiving relays, a receiving leg whereby a connection may be .extended from said set, said receiving leg being associated with said pole changers whereby impulses of different polarities may be applied to said receiving leg, a second set of switching arrangements, a plurality ot' sending relays adapted to be connected in said repeater set by said switching ar- 'angements, said sending relays being suitable or operation when a connection is established with different ones of said telegraph lines, a sending leg circuit to which BAXTER P. HAMILTON. 

